respiratory openings behind the eyes in sharks and rays 
Breathing holes positioned along the abdomen
External openings of tracheae.
lateral, oval to round openings of respiratory system found on the first thoracic and first 8 abdominal segments.
Breathing holes along the sides of the larvae on the first and fourth to eleventh segments.
Small openings in the abdominal segments of insects connected to a system of internal tubes (trachea) through which the insect 'breathes'.
respiratory openings behind the eyes in sharks and rays
the external openings, located on the ventrolateral corners of sternites III-VI, into the book lungs of the scorpion.
The external openings of the insect breathing (tracheal) system, found along the abdomen.
small openings through which insects breathe